"==============================================
"插件：ultisnips+vim-snippets
"功能：为代码提供智能补全功能（code snippet）
"      大概就是代码模板的意思
"注意：为了使得UltiSnips能够正常运行，记得将
"      Vundel文件夹下面的ftdetect文件夹拷贝到
"      vimfiles文件夹里面去。
Plugin 'SirVer/ultisnips'
Plugin 'honza/vim-snippets'
" Trigger configuration. Do not use <tab> if you use https://github.com/Valloric/YouCompleteMe.
let g:UltiSnipsExpandTrigger="<c-k>"
let g:UltiSnipsJumpForwardTrigger="<c-b>"
let g:UltiSnipsJumpBackwardTrigger="<c-z>"
" If you want :UltiSnipsEdit to split your window.
let g:UltiSnipsEditSplit="vertical"

" 下面这一段是为了解决YouCompleteMe和UltiSnips的tab键冲突的问题而加入的
function! g:UltiSnips_Complete()
    call UltiSnips#ExpandSnippet()
    if g:ulti_expand_res == 0
        if pumvisible()
            return "\<C-n>"
        else
            call UltiSnips#JumpForwards()
            if g:ulti_jump_forwards_res == 0
               return "\<TAB>"
            endif
        endif
    endif
    return ""
endfunction

au BufEnter * exec "inoremap <silent> " . g:UltiSnipsExpandTrigger . " <C-R>=g:UltiSnips_Complete()<cr>"
"let g:UltiSnipsJumpForwardTrigger="<tab>"
let g:UltiSnipsListSnippets="<c-e>"
" this mapping Enter key to <C-y> to chose the current highlight item 
" and close the selection list, same as other IDEs.
" CONFLICT with some plugins like tpope/Endwise
inoremap <expr> <CR> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"
